Able to reproduce the issue on Windows 10 using chrome reported version #61.0.3163.79 and latest canary #63.0.3214.0.
Issue in not seen in OS-Mac and OS-Linux.

Bisect Information:
=====================
Good build: 54.0.2807.0    Revision(407480)
Bad Build : 54.0.2808.0    Revision(407658)

Change Log URL: 
https://chromium.googlesource.com/chromium/src/+log/f7789f833aa26bc38fe4a74276b0a57c45ca3c65..48e079d573d6385fab6ad7110475a2b9da913bab

From the above change log suspecting below change
Review url: https://codereview.chromium.org/2175693004

robliao@ - Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

Note: Chrome did not invoke by using per-revision script. Hence, found the suspect by running old script(invoking chromium builds).

Thanks...!!

Can you try --enable-pixel-canvas-recording flag and see if this still repros?

Readjusting priority as this is claimed to have been a regression from 10 releases ago.

On older builds, you can try --disable-per-monitor-dpi to see if it no longer repros. Generally you need at least two monitors of different DPIs for issues in the referenced CL.

comment 3, is this flag not available in stable channel? I can't find it. (I am not allowed to download chrome beta/dev/canary on this machine)

#5, it's just a command line flag, not in chrome://flags.

I just enabled pixel canvas and that seems to have fixed it, but it's also cause a new problem with it: when I hover the cursor over the downloaded item, the text either gets slightly taller or the font changes (I can't tell which). 

**UI mass Triage** 

As per C#7, closing this issue.If you feel this issue should still be addressed, Please feel free to reopen it or to file a new issue.

Thanks..!!